Currently, the tag ovidius has five questions, and the tag ovid has one question. The questions are clearly about the same author (and there is only one famous poem named Ovid, as far as I know). ovid is not marked as a synonym of ovidius (or vice versa). It shouldn't be difficult to choose a canonical tag and mark the other one as a synonym. What do you think?
Thank you for noticing! We have discussed author tags on meta before, and we concluded that they should be in the original Latin form. This has been our policy both de facto and de iure.
Therefore I went ahead and marked ovid as a synonym of ovidius, leaving ovidius as the main tag. Having English or other forms of the tags as synonyms is fine, as it may help some find the author they want, so I would not forcibly remove them.
(If there are disagreements about synonyms, they can always be undone. A moderator's word need not be final.)